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Theses

Vers une amélioration d'un modèle global pluie-débit

Abstract : There is today a large number of existing lumped conceptual or empirical hydrological models for simulating the rainfall-runoff transformation at catchment scale. The study examined and evaluated 38 model structures on 429 catchments located in France, the United-States, Australia, the Ivory Coast and Brazil. All structures were evaluated in the same testing framework and fed with the same amount of data. Their parameters were calibrated using a local optimisation search procedure which proved able to locate satisfactory sets of optimum parameters. The performances in terms of quality of observed streamflow simulation was assessed with several quantitative criteria, including new formulations. Tests results indicate that a low number of free parameters (3 to 5) is sufficient to achieve model simulations as satisfactory as those obtained with models with a larger number of parameters and that an increasing number of degrees of freedom limits model robustness. Furthermore model structure plays a key role in the quality of simulations. Some mathematical tools used in different structures appear complementary and their association in a single model may improve streamflow simulations. The structure of the simple GR3J model was thus modified into a more satisfactory four-parameter structure, with improved low flow simulations.
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https://tel.archives-ouvertes.fr/tel-00006216
Contributor : Charles Perrin <>
Submitted on : Thursday, June 10, 2004 - 9:28:02 AM
Last modification on : Monday, September 2, 2019 - 2:20:09 PM
Long-term archiving on: : Wednesday, September 12, 2012 - 4:10:10 PM

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  • HAL Id : tel-00006216, version 1

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Charles Perrin. Vers une amélioration d'un modèle global pluie-débit. Hydrologie. Institut National Polytechnique de Grenoble - INPG, 2000. Français. ⟨tel-00006216⟩

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